…and you must love the Lord your God with all your heart, with all your soul, with all your mind and with all your strength. The second is this: You must love your neighbour as yourself. There is no commandment greater than these. (Mark 12:30-31)

The Church recognizes that in many ways she is linked with those who, being baptized, are honored with the name of Christian, though they do not profess the faith in its entirety or do not preserve unity of communion with the successor of Peter. — LG #15